Rachel McAdams walks the red carpet at the premiere of the film 'About Time' at the Film4 Summer Screen cinema at Somerset House in London on Aug. 8, 2013. (Alessio Fiori / Barcroft Media / startraksphoto.com)

Rachel McAdams sported a futuristic look at the premiere of the British sci-fi romantic comedy "About Time" in London on Thursday, Aug. 8.

The 34-year-old red-headed actress wore a full-length, long-sleeve, light lavender Roksanda Illincic Resort 2014 gown with a long train reminicest of a wedding dress and a teal and electric blue stripe running down the back. A wide, silvery hologram belt completed the look.

"About Time" is about a 21-year-old man, played by Domhnall Gleeson, who discovers he has inherited a fun family trait -- he can time-travel and change events that occurred in his own life. So he does, with the intention of finding a girlfriend, but then hijinks ensue when he accidentally messes up the timeline. The movie was written and directed by Richard Curtis, creator of the film "Love, Actually."